____ is a group of physical symptoms of the fight/flight response that unexpectedly occur in the absence of any obvious threat or danger

When comparing positions used for the birth process, kneeling or squatting has an advantage over lying flat because it makes use of _____

a. centripetal force b. gravity c. pelvic muscles d. the uterine wall

How many basic geons comprise the objects we recognize on a day-to-day basis, according to Biederman?

a) 6 b) 16 c) 36 d) 76